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' 15 October 2001
<br /> AGE-NC Project No 96-0232
<br />' Page 4of17
<br />' of 12µg/l(Tables 5 and 6) The laboratory analysis did not detect any other constituents of concern
<br /> Analytical results of pump-and-treat influent-water samples are summarized in Table 1, analytical
<br /> results for samples collected from the extraction wells are in Table 6, laboratory reports are in
<br />' Appendix B
<br />' 2 5 EFFLUENT MONITORING
<br /> In accordance with the requirements of RWQCB Monitoring and Reporting Program No 5-00-119,
<br />' monthly ground water pump-and-treat effluent monitoring was performed for flow rate, specific
<br /> conductivity(EC), pH, temperature,total dissolved solids (TDS),TPH-g, TPH-d, TPH-mo, BTEX,
<br />' MTBE, methanol, ethanol, DIPE, TAME, ETBE, TBA, nitrate and total lead on 02 July, 01 August
<br /> and 06 September 2001, additionally,ground water pump-and-treat effluent quarterly sampling for
<br /> bioassay analysis was performed on 10 September 2001
<br /> Laboratory analysis of pump-and-treat effluent grab water samples collected on 02 July, 01 August
<br /> and 06 September 2001 did not detect any petroleum constituents of concern (Table 1), nitrate as
<br />�. NO3 was detected at concentrations of 52 milligrams per liter (mg/1), 46 mg/l and 12 5 mg/l,
<br /> respectively, TDS values were reported at 620 mg/l, 580 mg/l and 570 mg/l, respectively Analytical
<br /> results are summarized in Tables 1 and 2, laboratory reports are in Appendices B and C
<br /> A bioassay laboratory analysis was performed on the grab sample collected from the effluent stream
<br /> on 10 September 2001 The analysis utilized sample factors of 0 milliliter (ml), 125 ml, 500 ml,
<br />' 1,000 ml, 1,500 mi and 2,000 ml Each sample factor was tested with 20 Fathead minnow fish and
<br /> a dilution volume of 2,000 ml of di-ionized water, pH, dissolved oxygen (DO) and temperature
<br /> parameters were monitored and fish mortalities were counted over 96 hours The bioassay analysis
<br /> I generally reported a steady decrease in pH and DO in each sample factor over the 96 hour period,
<br /> the analysis reported decreasing pH and DO values with increasing sample factors Temperature
<br /> measurements vaned between 20 5 and 20 8 degrees Celsius(°C) The laboratory reported that there
<br /> was one fish mortality after 96 hours in the above referenced sample, laboratory analysis of a
<br /> duplicate sample reported no fish mortalities after 96 hours The bioassay analysis is summarized
<br /> Iin Table 3, laboratory reports are in Appendix C
<br /> Utilizing an ICM water analyzer in the field, EC values were monitored on 02 July, 01 August and
<br /> 06 September 2001 at 1035µmhos/cm, 1013,umhos/cm and 912�Zrnhos/cm,respectively,pH values
<br /> were monitored at 7 20, 7 03 and 7 64,respectively, and temperature values at 23 0 °C,22 2 °C and
<br /> 22 7 'C, respectively Field monitoring results are summarized in Table 2
<br /> Utilizing a Blue-White Industries F-2000 flow meter, flow rates were observed on 02 July,
<br /> 01 August and 06 September 2001 at 21 73 GPM,23 10 GPM and 23 02 GPM,between 01 July and
<br /> Advanced GeoEnvironmental,Inc
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